Outstanding dark green crystals of the very rare mineral paratacamite-(Ni) (IMA 2013-013) from the type and only known locality worldwide: Carr Boyd Ni Mine, Goongarrie, Western Australia, Australia. Associated minerals are the also rare nickel minerals hydrohonessite (yellow crystalline crust) and glaukosphaerite (green globules). Three very rare and aesthetic nickel minerals in a single specimen ! — Photo: David Hospital · CC BY-SA 4.0
Paratacamite-(Ni)
Paratacamite-(Ni) is an IMA-recognized mineral species in the halide class, with the chemical formula Cu₃(Ni,Cu)Cl₂(OH)₆.
It crystallizes in the hexagonal crystal system (space group R-3). It is a member of the Atacamite structural group.
Key properties: Mohs hardness 3; specific gravity 3.7; Light green streak; Vitreous luster; optically uniaxial.
IMA symbol Pata-Ni, IMA status: approved, named in 2013.
Forms secondarily through oxidation of pentlandite in a saline environment.
It is found associated with Gillardite, spangolite, gypsum.
As the nickel analogue of paratacamite.